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Testing & setting presuretrol
I made this device to test presuretrols and recalibrate
Them by adjusting the set screw until I get what I need
Leaving the fittings loose on tester lets the presure drop slowly
After it trips to see when it closes.
Works very well. I've had new presuretrols out of the box
Not shut off until 7 lbs. while it was set to 1lb.